256723835507 has 2 divisors, whose sum is σ = 256723835508. Its totient is φ = 256723835506.

The previous prime is 256723835477. The next prime is 256723835527. The reversal of 256723835507 is 705538327652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256723835507 - 2¹² = 256723831411 is a prime.

It is not a weakly prime, because it can be changed into another prime (256723835527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128361917753 + 128361917754.

It is an arithmetic number, because the mean of its divisors is an integer number (128361917754).

Almost surely, 2^256723835507 is an apocalyptic number.

256723835507 is a deficient number, since it is larger than the sum of its proper divisors (1).

256723835507 is an equidigital number, since it uses as much as digits as its factorization.

256723835507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584000, while the sum is 53.

The spelling of 256723835507 in words is "two hundred fifty-six billion, seven hundred twenty-three million, eight hundred thirty-five thousand, five hundred seven".